SPRINGFIELD -- The smell of natural gas prompted the brief evacuation of troopers from the Massachusetts State Police barracks on Armory Street Monday, an official said.

The Fire Department and a crew from Columbia Gas of Massachusetts were called and the barracks was ventilated. By 9:30 p.m., it was determined the air wasn't harmful, said Trooper Kenneth Gaetz, of state police media relations in Framingham.

Crews were trying to determine the cause of the leak. No injuries were reported, he said.